Question

1. How can we decolourise a leaf? Explain 2. Algae and fungi live together in lichens. Justify the same 3. I place a potted plant in a room in complete darkness. After 3 days. I take the plant out and test the leaf for presence of starch. Will the test be positive? Give reasons

Answer 1

Answer:

3. No the presence of starch test will result negative because leaf prepares food in sunlight and oxygen and sunlight both are required to produce starch. If leaf is kept in a dark place for 3 days then the plant won't produce starch and hence the test for presence of starch will result negative.

Hope this helps u.

Answer 2

Answer:

1. We can decolourise a leaf by simply extracting it's chlorophyll by boiling it.

2. Yes, they live together in litchens ad they benefit each other mutually in a symbiotic relationship.

3. No starch will be observed as photosynthesis wouldn't have taken place in a dark room where there is no sunlight.